[models] Fix '_encode_params'/'_encode_files'

[wy-z]

trafficstars

Look at https://github.com/kennethreitz/requests/blob/master/requests/models.py#L100 or https://github.com/kennethreitz/requests/blob/master/requests/models.py#L131

for v in vs:
    if v is not None:
        ...

When the type of vs is dict, v will be the field key, but not field value, the body of the request will be puzzling. It would be better to prevent it.

Signed-off-by: weiyang [email protected]

[wy-z]

https://github.com/kennethreitz/requests/issues/5058

[martimlobao]

Why was this PR deleted? This was a good fix imo.

[wy-z]

I'll reopen this if necessary. @martimlobao